研究报告

多环境下早籼稻重组自交系群体的抽穗期QTL分析

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  • 湖南农业大学 水稻科学研究所, 长沙 410128;

收稿日期: 2013-03-15

  修回日期: 2013-04-06

  网络出版日期: 2013-07-10

基金资助

国家863计划资助项目(2012AA101103);教育部创新团队发展计划资助项目(IRT1239);湖南省高校科技创新团队支持计划资助项目。

QTL Analysis for Heading Date by Using Recombinant Inbred Lines Derived from Earlyseason indica Rice Across Multienvironments

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  • Rice Research Institute, Hunan Agricultural University, Changsha 410128, China;

Received date: 2013-03-15

  Revised date: 2013-04-06

  Online published: 2013-07-10

摘要

利用两个早籼稻品种996和4628构建的重组自交系群体为材料,于2009-2012年采用分期播种方式进行了抽穗期QTL分析。共检测到7个抽穗期QTL,即qHD1.1、qHD1.2、qHD2、qHD3、qHD7.1、qHD7.2和qHD10,分别位于第1、2、3、7和10染色体上。除qHD1.1、qHD1.2以外的其余5个QTL能在两个以上播期试验中检测到,其中qHD3、qHD7.1和qHD7.2在 4年12个环境中重复检测到。这些QTL中,qHD1.1、 qHD1.2、qHD3和qHD10表现为延长抽穗期,qHD2、qHD7.1和qHD7.2则表现为缩短抽穗期。其中,qHD7.1和qHD7.2在不同环境中表型贡献率分别为1900%~54.84%和18.31%~57.87%,能缩短抽穗期1.9~3.7 d和1.9~3.8 d,在南方双季稻区早熟型早稻品种选育中具有重要应用价值。

本文引用格式

何云丽,叶乃忠,郝明,罗丽华,肖应辉* . 多环境下早籼稻重组自交系群体的抽穗期QTL分析[J]. 中国水稻科学, 2013 , 27(4) : 389 -397 . DOI: 10.3969/j.issn.1001-7216.2013.04.008

Abstract

Two hundred and eightysix recombinant inbred lines (RIL) derived from a cross between two earlyseason rice varieties, 996 and 4628, were used to map QTLs controlling heading date from 2009 to 2012. Seven QTLs controlling heading date, namely qHD1.1,  qHD1.2, qHD2, qHD3, qHD7.1, qHD7.2 and  qHD10, were detected on chromosome 1, 2, 3, 7 and 10, respectively. All the QTLs except  qHD1.1 and qHD1.2 could be detected at least in two split sowing treatments. Among them, qHD3, qHD7.1  and  qHD7.2 could be detected in all twelve split sowing treatments. Four QTLs, including qHD1.1,  qHD1.2, qHD3 and qHD10  with positive additive effects derived from the 996 alleles, delayed the heading date. However, qHD7.1 and qHD7.2, explaining 19.00%-5484% and 1831%-57.87% of the total phenotypic variation for heading date, and shortening  the heading date by 1.9-3.7 d and 1.9-3.8 days, respectively, could be useful for molecular markeraided breeding of doublecropping earlyseason rice cultivars in Southern China.

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